Bad reaction to St. John's Wort or fish oil?

Okay, for a few weeks now I've been taking SJW and fish oil every day, and have progressively felt worse. Within the last week or so, I became really short of breath (felt like someone inflated a balloon in my chest), had really bad pressure and pain in the left side of my chest, had absolutely zero appetite, and almost completely disconnected from the world...it felt as though I no longer existed. Finally at the end of my rope, after waking up this morning and feeling like I was going to die, I decided to take nothing but my Zoloft, which I've been on for about a week and a half...and I feel *completely* different. I'm still "zoned out" and can't concentrate, but I can breathe again, my appetite came raging back, and I've been extremely talkative all night--pretty amazing, considering I could hardly whisper a complete sentence just yesterday.

I wonder...could all this have been a bad reaction to the SJW? Has fish oil been known to cause extreme reactions in certain people? Maybe I'm allergic...